Vitiligo: Overview Vitiligo: This skin disease often forms on both sides of the body as shown here on the knees. Vitiligo (vit-uh-lie-go) causes the skin to lose color. Patches of lighter skin appear. Some people develop a few patches. Others lose much more skin color.
Removing and inspecting spark plugs tell you a lot about how well the engine is running and what may be causing problems. All spark plugs should be removed and checked every 30,000 miles - even if your BMW is low maintenance - you're told to change spark plugs at 100,000 miles. This prevents the plugs from seizing in the block, causing expensive repairs down the road. Always note which plug came from which cylinder.
Cars with platinum tipped plugs are pretty much used up @ 40,000 - 50,000 miles. If you buy $2.50 spark plugs be prepared to feed the car a steady diet every 12,000 -20,000 miles. New silicone jacketed spark plug wires are a must every time you change the plugs in all the above instances.